Diluted exhaust gases from a late-model Volkswagen vehicle were fed into chambers where the monkeys were exposed for four hours

Published Jan 30, 2018 at 12:44 PM

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In this Aug. 1, 2017 file photo, the brand logo of German car maker Volkswagen, VW, is photographed on a car in Berlin, Germany. The chairman of Volkswagen says that diesel exhaust tests involving monkeys were "totally incomprehensible" and the matter must be "investigated fully and unconditionally." Monday's comments by Hans Dieter Poetsch, reported by the dpa news agency, come in the wake of a report by the New York Times that a research group funded by auto companies exposed monkeys to diesel exhaust from a late-model Volkswagen, while another group was exposed to fumes from an older Ford pickup.

Automaker Volkswagen has suspended its head of external relations and sustainability in response to widespread public criticism over experiments in which monkeys were exposed to diesel exhaust.

The company said in a statement Tuesday that Thomas Steg was stepping away from his duties at his own request.

The statement from the automaker said that the company was "drawing the first consequences" as it investigates the activities of EUGT, the entity backed by Volkswagen and other carmakers that commissioned the monkey experiment.

Steg had said in an interview published in the Bild newspaper that he had known about the experiment but did not inform the company's then-CEO, Martin Winterkorn. Steg said he rejected an initial proposal to use human volunteers and said that even after animals were substituted the experiment "should not have taken place."

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The move follows a report in The New York Times that the now-disbanded EUGT commissioned the 2014 monkey test at the Lovelace Respiratory Institute in Albuquerque, New Mexico, to measure how Volkswagen's diesel technology was succeeding in controlling harmful emissions.

Diluted exhaust gases from a late-model Volkswagen vehicle were fed into chambers where the monkeys were exposed for four hours; afterwards, lung samples were taken; the monkeys were not killed as part of the tests but their fate is not clear. The study did not deliver a definitive result.

The test was done with a vehicle that used illegal software to cheat on emissions tests, turning controls off when the vehicle was not being tested. That practice was then exposed in 2015, leading to Winterkorn's resignation.

Volkswagen's current CEO, Matthias Mueller, said in the statement that "we are investigating in detail the work of EUGT, which was dissolved in 2017, and drawing the necessary conclusions." He said that Steg "has declared that he takes full responsibility, and I respect that."

Volkswagen said the probe would be carried out "at top speed." Board Chairman Hans Dieter Poetsch said that the board's executive committee expected to hear results of the investigation next week, the dpa news agency reported. "We will ensure that such things will not be repeated," he said. The company has said that rejects animal experiments and that "we apologize for the wrong behavior and bad decisions of individuals."

Government officials, environmental groups and animal rights activists all condemned the experiment.

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Daimler and BMW also condemned the experiment and said they were investigating. The New York Times report said that the three companies backed EUGT financially.

The monkey scandal is another black eye for the German auto industry as it seeks to move past the Volkswagen scandal and the doubts it unleashed over how clean diesel technology really was. Volkswagen paid billions in fines and settlements and pleaded guilty to criminal charges. The Volkswagen case led to increased scrutiny of diesel cars from other manufacturers, which were found to emit more in everyday driving than during tests, though not necessarily through illegal software as at Volkswagen.